CA2548983C - Device and method for manufacturing wrapped tubes - Google Patents
Device and method for manufacturing wrapped tubes Download PDFInfo
- Publication number
- CA2548983C CA2548983C CA2548983A CA2548983A CA2548983C CA 2548983 C CA2548983 C CA 2548983C CA 2548983 A CA2548983 A CA 2548983A CA 2548983 A CA2548983 A CA 2548983A CA 2548983 C CA2548983 C CA 2548983C
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- Canada
- Prior art keywords
- winding
- reinforcing fibers
- thermoplastic
- fibers
- winding core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000004804 winding Methods 0.000 claims abstract description 62
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 30
- 239000012783 reinforcing fiber Substances 0.000 claims abstract description 27
- 238000004898 kneading Methods 0.000 claims abstract description 21
- 229920003023 plastic Polymers 0.000 claims abstract description 21
- 239000004033 plastic Substances 0.000 claims abstract description 21
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 21
- 239000000835 fiber Substances 0.000 claims description 37
- -1 polyethylene Polymers 0.000 claims description 23
- 239000012815 thermoplastic material Substances 0.000 claims description 15
- 239000004698 Polyethylene Substances 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 14
- 229920000573 polyethylene Polymers 0.000 claims description 14
- 239000004743 Polypropylene Substances 0.000 claims description 11
- 229920001155 polypropylene Polymers 0.000 claims description 9
- 239000007767 bonding agent Substances 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 241000531908 Aramides Species 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 229920003235 aromatic polyamide Polymers 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 239000008187 granular material Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/16—Rigid pipes wound from sheets or strips, with or without reinforcement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/56—Winding and joining, e.g. winding spirally
- B29C53/58—Winding and joining, e.g. winding spirally helically
- B29C53/581—Winding and joining, e.g. winding spirally helically using sheets or strips consisting principally of plastics material
- B29C53/582—Winding and joining, e.g. winding spirally helically using sheets or strips consisting principally of plastics material comprising reinforcements, e.g. wires, threads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/285—Feeding the extrusion material to the extruder
- B29C48/288—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules
- B29C48/2886—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules of fibrous, filamentary or filling materials, e.g. thin fibrous reinforcements or fillers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
- B29C48/38—Plasticisers, homogenisers or feeders comprising two or more stages using two or more serially arranged screws in the same barrel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
- B29C48/404—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders the screws having non-intermeshing parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/56—Winding and joining, e.g. winding spirally
- B29C53/58—Winding and joining, e.g. winding spirally helically
- B29C53/60—Winding and joining, e.g. winding spirally helically using internal forming surfaces, e.g. mandrels
- B29C53/62—Winding and joining, e.g. winding spirally helically using internal forming surfaces, e.g. mandrels rotatable about the winding axis
- B29C53/66—Winding and joining, e.g. winding spirally helically using internal forming surfaces, e.g. mandrels rotatable about the winding axis with axially movable winding feed member, e.g. lathe type winding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/80—Component parts, details or accessories; Auxiliary operations
- B29C53/84—Heating or cooling
- B29C53/845—Heating or cooling especially adapted for winding and joining
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/12—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of short lengths, e.g. chopped filaments, staple fibres or bristles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2305/00—Use of metals, their alloys or their compounds, as reinforcement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2309/00—Use of inorganic materials not provided for in groups B29K2303/00 - B29K2307/00, as reinforcement
- B29K2309/08—Glass
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/131—Glass, ceramic, or sintered, fused, fired, or calcined metal oxide or metal carbide containing [e.g., porcelain, brick, cement, etc.]
- Y10T428/1314—Contains fabric, fiber particle, or filament made of glass, ceramic, or sintered, fused, fired, or calcined metal oxide, or metal carbide or other inorganic compound [e.g., fiber glass, mineral fiber, sand, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/1372—Randomly noninterengaged or randomly contacting fibers, filaments, particles, or flakes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Moulding By Coating Moulds (AREA)
- Reinforced Plastic Materials (AREA)
- Making Paper Articles (AREA)
- Laminated Bodies (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
In a device and a method for manufacturing wrapped tubes by helically winding up a thermoplastic, preferably strip-shaped plastic profile (2) onto a winding core (1) in an overlapping manner, where a plasticizing aggregate supplies the plastic profile (2) via a profile nozzle (4), it is provided that the plasticizing aggregate is a kneading means (3) supplying a thermoplastic plastic mixed with reinforcing fibers to the winding core (1) via the profile nozzle (4).
Description
Device And Method For Manufacturing Wrapped Tubes Background of the Invention Field of the Invention The invention relates to a device as well as a method for manufacturing wrapped tubes by helically winding up a thermoplastic, preferably strip-shaped plastic profile onto a winding core in an overlapping manner, a plas-ticizing aggregate supplying the plastic profile via a profile nozzle.
Description of Related Art Devices for manufacturing a tubular object by helically or spirally winding up a band material of thermoplastic plastics are known, for example, from German Patent No. 1281676 issued on October 31, 1968 to Manfred Hawerkamp. Immediately after the band material has emerged from an ex-truder or has been heated, it is wound up, in a deformable state, onto a winding core with an overlapping and/or abutting, particularly obliquely abutting overlapping winding seam and welded by applying pressure and, if necessary, additional heat in the region of the winding seam in such a method.
Summary of the Invention It is an object of the invention to provide a device as well as a method for manufacturing wrapped tubes by which pressure tubes with a larger tube diameter are producible without an extreme enlargement of the wall thick-ness as would bb the case in the present wrapped tube production.
Description of Related Art Devices for manufacturing a tubular object by helically or spirally winding up a band material of thermoplastic plastics are known, for example, from German Patent No. 1281676 issued on October 31, 1968 to Manfred Hawerkamp. Immediately after the band material has emerged from an ex-truder or has been heated, it is wound up, in a deformable state, onto a winding core with an overlapping and/or abutting, particularly obliquely abutting overlapping winding seam and welded by applying pressure and, if necessary, additional heat in the region of the winding seam in such a method.
Summary of the Invention It is an object of the invention to provide a device as well as a method for manufacturing wrapped tubes by which pressure tubes with a larger tube diameter are producible without an extreme enlargement of the wall thick-ness as would bb the case in the present wrapped tube production.
The invention advantageously provides that the plasticizing aggregate is a kneading means supplying the winding core with a thermoplastic plastic mixed with reinforcing fibers via the profile nozzle.
Because of the use of a screw kneading aggregate, reinforcing fibers with greater fiber lengths can also be mixed homogeneously with the thermoplas-tic plastic without shortening or grinding the fibers. The screw kneading ag-gregate permits the exactly metered addition of fibers into the processed molten mass, the fiber length of the added fibers being preserved. The in-crease in pressure-resistance and tensile strength due to the fiber strength-ening permits to manufacture, e.g., larger tube diameters with a tube wall of lesser wall thickness and thus of small weight. Due to the strengthening, pressure tubes with an outer diameter of, e.g., up to 4 m and more are pro-ducible as wrapped tubes.
Such a homogenized mixture of fibers and thermoplastic plastic while pre-serving the fiber length of the fibers cannot be produced by a conventional extruder because of the very high shearing forces, since the fibers are shortened and ground due to the occurring shearing forces.
Preferably, the thermoplastic plastic consists of polyethylene or polypropyl-ene. No granules with fillers are used but polyethylene granules or polypro-pylene granules are plasticized in the kneader and provided with fiber-shaped reinforcing agents, in principle, all strength-increasing reinforcing fibers being suitable.
Preferably, the reinforcing fibers consist of plastic, glass and/or metal, glass fibers in particular, but also aramide fibers and/or carbon fibers being highly strength-increasing.
When several layers of the plastic profile are wound up, this is effected un-der a different supply angle so that the fiber-reinforced superposed winding layers cross each other whereby the internal pressure resistance of the wrapped tubes is additionally increased.
On the outside of the wrapped tube, a profile, preferably a tube profile, may be additionally wound onto the outer tube wall to increase the tube stiffness and the moment of inertia.
The fiber length of the reinforcing fibers amounts to at least about 2 mm, but preferably to more than 4 mm up to endless fibers.
The screw kneading aggregate is adapted to process such fiber lengths up to endless fibers.
The fiber-reinforced thermoplastic mixture homogenized in the screw kneader consists of about 60 to about 94 percent by weight of polyethylene or polypropylene, about 1 to about 10 % of the bonding agent as well as of about 5 to about 40 percent by weight of reinforcing fibers arranged in an uniformly distributed manner in random orientation in the plastic profile.
The bonding agent particularly serves to improve the adhesion between the polyethylene or polypropylene and the fibers.
In addition to the at least one layer formed of the fiber-reinforced plastic profiles, an innermost and/or an outermost winding layer of polyethylene without fiber reinforcement may also be wound up onto the winding core.
According to an aspect of the present invention there is provided a device for manufacturing wrapped tubes by helically winding shaped thermoplastic onto a winding core, the device comprising:
a plasticizing unit for supplying the shaped thermoplastic to the winding core via a nozzle, 3a wherein the plasticizing unit is a kneading means supplying the shaped thermoplastic via the nozzle, and the shaped thermoplastic comprises thermoplastic material mixed with reinforcing fibers, and wherein the kneading means is a screw kneading unit, such that the reinforcing fibers can be homogeneously mixed with the thermoplastic material, while fiber length of the reinforcing fibers is maintained.
According to another aspect of the present invention there is provided a method for manufacturing wrapped tubes by winding shaped thermoplastic onto a winding core in an overlapping manner, the shaped thermoplastic being supplied to the winding core from a plasticizing unit and a nozzle, the method comprising the steps of.
heating a thermoplastic material to a predetermined melting temperature;
homogeneously mixing the heated thermoplastic material with reinforcing fibers in a kneading means, wherein the kneading means comprises a screw kneader and is employed as the plasticizing unit for manufacturing said wrapped tubes with an increased internal pressure resistance; and supplying the fiber-reinforced homogenized thermoplastic material mixture to the winding core via the nozzle.
According to a further aspect of the present invention there is provided a wrapped tube manufactured according to the method as described herein, wherein the fiber-reinforced homogenized thermoplastic material mixture comprises:
- 60 to 94 percent by weight of polyethylene or polypropylene;
- 1 to 10 percent by weight of bonding agent; and - 5 to 40 percent by weight of the reinforcing fibers arranged in random orientation.
3b Brief Description of the Drawings Hereinafter, an embodiment of the invention is explained with reference to the drawings, in which Fig. 1 shows, in side view, a device according to the invention, for manu-facturing wrapped tubes;
Because of the use of a screw kneading aggregate, reinforcing fibers with greater fiber lengths can also be mixed homogeneously with the thermoplas-tic plastic without shortening or grinding the fibers. The screw kneading ag-gregate permits the exactly metered addition of fibers into the processed molten mass, the fiber length of the added fibers being preserved. The in-crease in pressure-resistance and tensile strength due to the fiber strength-ening permits to manufacture, e.g., larger tube diameters with a tube wall of lesser wall thickness and thus of small weight. Due to the strengthening, pressure tubes with an outer diameter of, e.g., up to 4 m and more are pro-ducible as wrapped tubes.
Such a homogenized mixture of fibers and thermoplastic plastic while pre-serving the fiber length of the fibers cannot be produced by a conventional extruder because of the very high shearing forces, since the fibers are shortened and ground due to the occurring shearing forces.
Preferably, the thermoplastic plastic consists of polyethylene or polypropyl-ene. No granules with fillers are used but polyethylene granules or polypro-pylene granules are plasticized in the kneader and provided with fiber-shaped reinforcing agents, in principle, all strength-increasing reinforcing fibers being suitable.
Preferably, the reinforcing fibers consist of plastic, glass and/or metal, glass fibers in particular, but also aramide fibers and/or carbon fibers being highly strength-increasing.
When several layers of the plastic profile are wound up, this is effected un-der a different supply angle so that the fiber-reinforced superposed winding layers cross each other whereby the internal pressure resistance of the wrapped tubes is additionally increased.
On the outside of the wrapped tube, a profile, preferably a tube profile, may be additionally wound onto the outer tube wall to increase the tube stiffness and the moment of inertia.
The fiber length of the reinforcing fibers amounts to at least about 2 mm, but preferably to more than 4 mm up to endless fibers.
The screw kneading aggregate is adapted to process such fiber lengths up to endless fibers.
The fiber-reinforced thermoplastic mixture homogenized in the screw kneader consists of about 60 to about 94 percent by weight of polyethylene or polypropylene, about 1 to about 10 % of the bonding agent as well as of about 5 to about 40 percent by weight of reinforcing fibers arranged in an uniformly distributed manner in random orientation in the plastic profile.
The bonding agent particularly serves to improve the adhesion between the polyethylene or polypropylene and the fibers.
In addition to the at least one layer formed of the fiber-reinforced plastic profiles, an innermost and/or an outermost winding layer of polyethylene without fiber reinforcement may also be wound up onto the winding core.
According to an aspect of the present invention there is provided a device for manufacturing wrapped tubes by helically winding shaped thermoplastic onto a winding core, the device comprising:
a plasticizing unit for supplying the shaped thermoplastic to the winding core via a nozzle, 3a wherein the plasticizing unit is a kneading means supplying the shaped thermoplastic via the nozzle, and the shaped thermoplastic comprises thermoplastic material mixed with reinforcing fibers, and wherein the kneading means is a screw kneading unit, such that the reinforcing fibers can be homogeneously mixed with the thermoplastic material, while fiber length of the reinforcing fibers is maintained.
According to another aspect of the present invention there is provided a method for manufacturing wrapped tubes by winding shaped thermoplastic onto a winding core in an overlapping manner, the shaped thermoplastic being supplied to the winding core from a plasticizing unit and a nozzle, the method comprising the steps of.
heating a thermoplastic material to a predetermined melting temperature;
homogeneously mixing the heated thermoplastic material with reinforcing fibers in a kneading means, wherein the kneading means comprises a screw kneader and is employed as the plasticizing unit for manufacturing said wrapped tubes with an increased internal pressure resistance; and supplying the fiber-reinforced homogenized thermoplastic material mixture to the winding core via the nozzle.
According to a further aspect of the present invention there is provided a wrapped tube manufactured according to the method as described herein, wherein the fiber-reinforced homogenized thermoplastic material mixture comprises:
- 60 to 94 percent by weight of polyethylene or polypropylene;
- 1 to 10 percent by weight of bonding agent; and - 5 to 40 percent by weight of the reinforcing fibers arranged in random orientation.
3b Brief Description of the Drawings Hereinafter, an embodiment of the invention is explained with reference to the drawings, in which Fig. 1 shows, in side view, a device according to the invention, for manu-facturing wrapped tubes;
Fig. 2 shows the device according to Fig. 1 in top view; and Fig. 3 shows the winding of several winding layers.
Detailed Description of the Preferred Embodiment of the Invention Figure 1 shows a device for manufacturing a wrapped tube by helically wind-ing up a thermoplastic, preferably strip-shaped plastic profile 2 onto a tem-perable or heatable winding core 1 in an overlapping manner.
A screw kneading aggregate 3 used for plasticizing is seated on a reciprocat-ing slide 5 that is adapted to be displaced to and fro along a guide 6 parallel to the winding core 1, the plastic profile 2 being supplied to the winding core 1 from the screw kneading aggregate 3 via a profile nozzle 4.
As can be seen from the top view of Fig. 2, the plastic profile 2 is supplied to the winding core 1 via the profile nozzle 4 under an oblique angle. In the reversal position of the slide 5 at the ends of the winding core 1, there arises an oblique angle with the same amount but with opposite direction because of the reversal of the direction of movement of the slide 5 so that succeed-ing winding layers 9a,9b cross each other. Preferably, it is provided that the start of a new winding layer is respectively effected at different ends of the winding core 1 so that the winding process can substantially be continued continuously. The first plastic profile 2 of a winding layer may also be sup-plied straight to obtain a straight end at the end faces of the wrapped tube.
From Fig. 3, the different orientation of the plastic profile 2 of superposed winding layers 9a,9b is apparent.
While the slide is thus moved to and fro, the winding core 1 rotates to wind up the strip-shaped plastic profile 2 in an overlapping manner, which profile is welded at the points of overlapping and abutment.
The screw kneading aggregate 3 supplies a homogenized mixture of a ther-moplastic plastic of polyethylene or polypropylene and reinforcing fibers of plastic, glass and/or metal to the profile nozzle 4. Upon emerging from the double screw kneader, the fibers are arranged in the mixture so as to be distributed homogeneously in random orientation in the thermoplastic plastic and then, they are supplied to the winding core 1 via the profile nozzle 4.
Preferably, the screw kneading aggregate consists of a double screw kneader where the screws arranged in parallel next to each other do not ro-tate in opposite directions but have the same rotational direction. The kneading means is also referred to as double screw kneader with the same rotational direction. In dependence on the processed mixture, the tempera-ture of the thermoplastic plastic amounts to about 170 to 240 C.
Single-screw as well as double screw extruders rotating in opposite direc-tions, however, are not suited to produce the mixture of fiber-reinforced fi-bers and thermoplastic plastic because they do not have a sufficient ho-mogenizing effect and shorten or grind the fibers because of the occurring shearing forces so that the pressure resistance required for the production of pressure-resistant wrapped tubes with large diameter cannot be achieved.
Preferably, reinforcing fibers of glass fibers are employed, for particular ap-plications and particularly high strength requirements, however, aramide fibers and/or carbon fibers or a mixture of different fibers can be used as well.
The fiber length should amount to at least 2 mm, preferably, however, to more than 4 mm. In a preferred embodiment, the fiber length amounts to about 6 mm. It is also possible, however, to use longer fibers up to endless fibers.
The fiber-reinforced thermoplastic plastic mixture emerging from the screw kneader 3 preferably consists of about 60 to about 94 percent by weight of polyethylene or polypropylene, about 1 to about 10 % of bonding agent as well as of about 5 to about 40 percent by weight of reinforcing fibers.
Therefore, a double screw kneader 3 is used as a plasticizing aggregate for manufacturing wrapped tubes with an increased internal pressure resis-tance, a thermoplastic plastic being brought to a predetermined melting temperature in the double screw kneader 3 and then being homogeneously mixed with reinforcing fibers. Subsequently, the fiber-reinforced homoge-nized thermoplastic plastic mixture can be supplied to the profile nozzle 4.
As a whole, the wrapped tube may be formed of several winding layers, where the innermost and/or the outermost winding layer may be formed of polyethylene without fiber reinforcement. Preferably, the fiber-reinforced winding layers are wound crosswise, i.e., radially adjacent winding layers 9a,9b extend under different angles such that the orientation of the fibers crosses each other in the individual winding layers.
By means of the described device and the manufacturing method, wrapped pressure tubes with large dimensions and very high internal pressure resis-tance are producible, the wall thickness, due to the fiber reinforcement, be-ing substantially, i.e., by about 50%, smaller than with conventional manu-facturing methods without fiber reinforcement.
In a wrapped tube with a diameter of about 4 m, for example, the wall thickness amounts to about 100 mm to 200 mm, each winding layer 9a,9b being formed of a plastic profile 2 with a thickness of about 5 to 10 mm.
Such pressure-resistant wrapped tubes are suitable for the conveyance of drinking water, for example.
As is apparent from Fig. 1, the winding core 1 rotates clockwise so that the plastic profile 2 is wound downward onto the winding core 1, a pressing means 7 pressing the plastic profile 2 against the winding core 1. The screw kneader 3 extends under an angle of 901 to the longitudinal axis of the winding core 1, the oblique angle of each winding layer 9,11 resulting solely from the advance of the slide 5.
Although the invention has been described and illustrated with reference to specific illustrative embodiments thereof, it is not intended that the invention be limited to those illustrative embodiments. Those skilled in the art will rec-ognize that variations and modifications can be made without departing from the true scope of the invention as defined by the claims that follow. It is therefore intended to include within the invention all such variations and modifications as fall within the scope of the appended claims and equivalents thereof.
Detailed Description of the Preferred Embodiment of the Invention Figure 1 shows a device for manufacturing a wrapped tube by helically wind-ing up a thermoplastic, preferably strip-shaped plastic profile 2 onto a tem-perable or heatable winding core 1 in an overlapping manner.
A screw kneading aggregate 3 used for plasticizing is seated on a reciprocat-ing slide 5 that is adapted to be displaced to and fro along a guide 6 parallel to the winding core 1, the plastic profile 2 being supplied to the winding core 1 from the screw kneading aggregate 3 via a profile nozzle 4.
As can be seen from the top view of Fig. 2, the plastic profile 2 is supplied to the winding core 1 via the profile nozzle 4 under an oblique angle. In the reversal position of the slide 5 at the ends of the winding core 1, there arises an oblique angle with the same amount but with opposite direction because of the reversal of the direction of movement of the slide 5 so that succeed-ing winding layers 9a,9b cross each other. Preferably, it is provided that the start of a new winding layer is respectively effected at different ends of the winding core 1 so that the winding process can substantially be continued continuously. The first plastic profile 2 of a winding layer may also be sup-plied straight to obtain a straight end at the end faces of the wrapped tube.
From Fig. 3, the different orientation of the plastic profile 2 of superposed winding layers 9a,9b is apparent.
While the slide is thus moved to and fro, the winding core 1 rotates to wind up the strip-shaped plastic profile 2 in an overlapping manner, which profile is welded at the points of overlapping and abutment.
The screw kneading aggregate 3 supplies a homogenized mixture of a ther-moplastic plastic of polyethylene or polypropylene and reinforcing fibers of plastic, glass and/or metal to the profile nozzle 4. Upon emerging from the double screw kneader, the fibers are arranged in the mixture so as to be distributed homogeneously in random orientation in the thermoplastic plastic and then, they are supplied to the winding core 1 via the profile nozzle 4.
Preferably, the screw kneading aggregate consists of a double screw kneader where the screws arranged in parallel next to each other do not ro-tate in opposite directions but have the same rotational direction. The kneading means is also referred to as double screw kneader with the same rotational direction. In dependence on the processed mixture, the tempera-ture of the thermoplastic plastic amounts to about 170 to 240 C.
Single-screw as well as double screw extruders rotating in opposite direc-tions, however, are not suited to produce the mixture of fiber-reinforced fi-bers and thermoplastic plastic because they do not have a sufficient ho-mogenizing effect and shorten or grind the fibers because of the occurring shearing forces so that the pressure resistance required for the production of pressure-resistant wrapped tubes with large diameter cannot be achieved.
Preferably, reinforcing fibers of glass fibers are employed, for particular ap-plications and particularly high strength requirements, however, aramide fibers and/or carbon fibers or a mixture of different fibers can be used as well.
The fiber length should amount to at least 2 mm, preferably, however, to more than 4 mm. In a preferred embodiment, the fiber length amounts to about 6 mm. It is also possible, however, to use longer fibers up to endless fibers.
The fiber-reinforced thermoplastic plastic mixture emerging from the screw kneader 3 preferably consists of about 60 to about 94 percent by weight of polyethylene or polypropylene, about 1 to about 10 % of bonding agent as well as of about 5 to about 40 percent by weight of reinforcing fibers.
Therefore, a double screw kneader 3 is used as a plasticizing aggregate for manufacturing wrapped tubes with an increased internal pressure resis-tance, a thermoplastic plastic being brought to a predetermined melting temperature in the double screw kneader 3 and then being homogeneously mixed with reinforcing fibers. Subsequently, the fiber-reinforced homoge-nized thermoplastic plastic mixture can be supplied to the profile nozzle 4.
As a whole, the wrapped tube may be formed of several winding layers, where the innermost and/or the outermost winding layer may be formed of polyethylene without fiber reinforcement. Preferably, the fiber-reinforced winding layers are wound crosswise, i.e., radially adjacent winding layers 9a,9b extend under different angles such that the orientation of the fibers crosses each other in the individual winding layers.
By means of the described device and the manufacturing method, wrapped pressure tubes with large dimensions and very high internal pressure resis-tance are producible, the wall thickness, due to the fiber reinforcement, be-ing substantially, i.e., by about 50%, smaller than with conventional manu-facturing methods without fiber reinforcement.
In a wrapped tube with a diameter of about 4 m, for example, the wall thickness amounts to about 100 mm to 200 mm, each winding layer 9a,9b being formed of a plastic profile 2 with a thickness of about 5 to 10 mm.
Such pressure-resistant wrapped tubes are suitable for the conveyance of drinking water, for example.
As is apparent from Fig. 1, the winding core 1 rotates clockwise so that the plastic profile 2 is wound downward onto the winding core 1, a pressing means 7 pressing the plastic profile 2 against the winding core 1. The screw kneader 3 extends under an angle of 901 to the longitudinal axis of the winding core 1, the oblique angle of each winding layer 9,11 resulting solely from the advance of the slide 5.
Although the invention has been described and illustrated with reference to specific illustrative embodiments thereof, it is not intended that the invention be limited to those illustrative embodiments. Those skilled in the art will rec-ognize that variations and modifications can be made without departing from the true scope of the invention as defined by the claims that follow. It is therefore intended to include within the invention all such variations and modifications as fall within the scope of the appended claims and equivalents thereof.
Claims (18)
1. A device for manufacturing wrapped tubes by helically winding shaped thermoplastic onto a winding core, the device comprising:
a plasticizing unit for supplying the shaped thermoplastic to the winding core via a nozzle, wherein the plasticizing unit is a kneading means supplying the shaped thermoplastic via the nozzle, and the shaped thermoplastic comprises thermoplastic material mixed with reinforcing fibers, and wherein the kneading means is a screw kneading unit, such that the reinforcing fibers can be homogeneously mixed with the thermoplastic material, while fiber length of the reinforcing fibers is maintained.
a plasticizing unit for supplying the shaped thermoplastic to the winding core via a nozzle, wherein the plasticizing unit is a kneading means supplying the shaped thermoplastic via the nozzle, and the shaped thermoplastic comprises thermoplastic material mixed with reinforcing fibers, and wherein the kneading means is a screw kneading unit, such that the reinforcing fibers can be homogeneously mixed with the thermoplastic material, while fiber length of the reinforcing fibers is maintained.
2. The device according to claim 1, wherein the shaped thermoplastic is strip-shaped.
3. The device according to claim 1 or 2 wherein the thermoplastic material comprises polyethylene or polypropylene.
4. The device according to any one of claims 1 to 3, wherein the reinforcing fibers comprise plastic, glass or metal fibers or a combination thereof.
5. The device according to any one of claims 1 to 3, wherein the reinforcing fibers comprise glass fibers, aramide fibers or carbon fibers or a combination thereof.
6. The device according to any one of claims 1 to 5, wherein the fiber length of the reinforcing fibers is at least 2 mm.
7. The device according to claim 6, wherein the fiber length of the reinforcing fibers is greater than 4 mm.
8. The device according to any one of claims 1 to 7, wherein the wrapped tubes comprise a plurality of superposed winding layers formed of the shaped thermoplastic and extending under an oblique angle relative to each other.
9. The device according to any one of claims 1 to 8, wherein the fiber-reinforced mixture homogenized in the kneading means comprises:
- 60 to 94 percent by weight of polyethylene or polypropylene;
- 1 to 10 percent by weight of bonding agent; and - 5 to 40 percent by weight of the reinforcing fibers.
- 60 to 94 percent by weight of polyethylene or polypropylene;
- 1 to 10 percent by weight of bonding agent; and - 5 to 40 percent by weight of the reinforcing fibers.
10. A method for manufacturing wrapped tubes by winding shaped thermoplastic onto a winding core in an overlapping manner, the shaped thermoplastic being supplied to the winding core from a plasticizing unit and a nozzle, the method comprising the steps of:
heating a thermoplastic material to a predetermined melting temperature;
homogeneously mixing the heated thermoplastic material with reinforcing fibers in a kneading means, wherein the kneading means comprises a screw kneader and is employed as the plasticizing unit for manufacturing said wrapped tubes with an increased internal pressure resistance; and supplying the fiber-reinforced homogenized thermoplastic material mixture to the winding core via the nozzle.
heating a thermoplastic material to a predetermined melting temperature;
homogeneously mixing the heated thermoplastic material with reinforcing fibers in a kneading means, wherein the kneading means comprises a screw kneader and is employed as the plasticizing unit for manufacturing said wrapped tubes with an increased internal pressure resistance; and supplying the fiber-reinforced homogenized thermoplastic material mixture to the winding core via the nozzle.
11. The method according to claim 10, wherein the shaped thermoplastic is strip-shaped.
12. The method according to claim 10 or 11, wherein the thermoplastic material comprises polyethylene or polypropylene.
13. The method according to any one of claims 9 to 12, wherein the reinforcing fibers comprise plastic, glass or metal fibers or a combination thereof.
14. The method according to any one of claims 10 to 13, wherein the wrapped tube is formed of a plurality of winding layers wrapped on top of each other.
15. The method according to claim 14, wherein the thermoplastic material is supplied to the winding core under a predetermined oblique angle.
16. The method according to claim 15, wherein the plurality of winding layers are wound up continuously, wherein the nozzle is provided on a slide, and wherein when the slide is at a reversal position at ends of the winding core, the oblique angle changes to a different oblique angle with opposite direction due to the reversal of the winding direction in such a manner that succeeding winding layers cross each other.
17. The method according to any one of claims 14 to 16, wherein the innermost and/or the outermost winding layer is wound of polyethylene without any fiber reinforcement.
18. A wrapped tube manufactured according to the method defined in claim 10, wherein the fiber-reinforced homogenized thermoplastic material mixture comprises:
- 60 to 94 percent by weight of polyethylene or polypropylene;
- 1 to 10 percent by weight of bonding agent; and - 5 to 40 percent by weight of the reinforcing fibers arranged in random orientation.
- 60 to 94 percent by weight of polyethylene or polypropylene;
- 1 to 10 percent by weight of bonding agent; and - 5 to 40 percent by weight of the reinforcing fibers arranged in random orientation.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10355073.9 | 2003-11-24 | ||
DE10355073A DE10355073A1 (en) | 2003-11-24 | 2003-11-24 | Apparatus and method for producing winding tubes |
PCT/EP2004/012649 WO2005053933A1 (en) | 2003-11-24 | 2004-11-09 | Device and method for producing filament-wound pipes |
Publications (2)
Publication Number | Publication Date |
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CA2548983A1 CA2548983A1 (en) | 2005-06-16 |
CA2548983C true CA2548983C (en) | 2011-01-04 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA2548983A Expired - Fee Related CA2548983C (en) | 2003-11-24 | 2004-11-09 | Device and method for manufacturing wrapped tubes |
Country Status (13)
Country | Link |
---|---|
US (1) | US20080193688A1 (en) |
EP (1) | EP1691967B1 (en) |
CN (1) | CN100528537C (en) |
AT (1) | ATE399631T1 (en) |
CA (1) | CA2548983C (en) |
DE (2) | DE10355073A1 (en) |
DK (1) | DK1691967T3 (en) |
ES (1) | ES2309575T3 (en) |
PL (1) | PL1691967T3 (en) |
PT (1) | PT1691967E (en) |
SI (1) | SI1691967T1 (en) |
TR (1) | TR200400617A2 (en) |
WO (1) | WO2005053933A1 (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202007004671U1 (en) | 2007-03-28 | 2008-08-07 | Rehau Ag + Co | helical support |
DE102007059299A1 (en) | 2007-05-16 | 2008-11-20 | Entex Rust & Mitschke Gmbh | Device for processing products to be degassed |
EP2146126B1 (en) | 2008-07-14 | 2013-01-23 | Pipelife Nederland B.V. | Method for manufacturing a helically wound pipe |
EP2377675A1 (en) | 2010-04-19 | 2011-10-19 | 3B-Fibreglass SPRL | Impregnation assembly and method for manufacturing a composite structure reinforced with long fibers |
US9173192B2 (en) * | 2011-03-17 | 2015-10-27 | Qualcomm Incorporated | Target cell selection for multimedia broadcast multicast service continuity |
CN102601959B (en) * | 2012-03-31 | 2015-05-20 | 飞跃(台州)新型管业科技有限公司 | Extruder for HDPE (High Density Polyethylene) winding reinforced pipe |
EP2653291B1 (en) | 2012-04-19 | 2018-08-15 | GE Oil & Gas UK Limited | Method of producing a flexible pipe body |
DE102012211651A1 (en) | 2012-07-04 | 2014-01-09 | Maincor Ag | Winding tube manufacturing method, involves producing continuous fiber sheet, and integrating continuous fiber sheet facing away from core at outer side of inner tube layer heated to its melting temperature |
CN103009613A (en) * | 2012-12-18 | 2013-04-03 | 山东彼岸电力科技有限公司 | Pipe winding machine of liner spiral pipe for high-voltage cold-shrink cable accessory |
CN103847115B (en) * | 2014-02-13 | 2017-02-08 | 沭阳冠中塑料制品有限公司 | Pipe-shaped foaming plastic material manufacturing device and method |
CN104084461B (en) * | 2014-06-27 | 2016-01-20 | 江苏天舒电器有限公司 | A kind of condenser coil around pipe method |
CN105034401A (en) * | 2015-06-11 | 2015-11-11 | 东阳市富士碳素制品有限公司 | Carbon fiber seamless fishing rod and manufacturing method thereof |
CN106182539A (en) * | 2016-07-12 | 2016-12-07 | 歌尔股份有限公司 | Fiber reinforcement sheet manufacture method and application thereof |
WO2020121037A1 (en) * | 2018-12-13 | 2020-06-18 | Exgineering Sa | Method for the production of extruded filaments with conductive elements |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1281676B (en) * | 1964-12-30 | 1968-10-31 | Manfred Hawerkamp | Process for the production of pipes and containers from helically wound strip material made of thermoplastic plastics |
GB1151964A (en) * | 1966-03-08 | 1969-05-14 | Werner & Pfleiderer | Method and Apparatus for the Continuous Preparation of Plastics Material Mixtures |
DE3018194C2 (en) * | 1980-05-13 | 1985-01-17 | Henze GmbH, 5210 Troisdorf | Process for the production of pipes or containers from plastic |
JPS5845023A (en) * | 1981-09-11 | 1983-03-16 | Sekisui Chem Co Ltd | Manufacture of composite pipe |
DE3145122C2 (en) * | 1981-11-13 | 1984-11-29 | Manfred 5210 Troisdorf Hawerkamp | Device for producing a pipe or the like from an extruded thermoplastic plastic profile |
DE3412258A1 (en) * | 1984-04-02 | 1985-10-10 | Werner & Pfleiderer, 7000 Stuttgart | SINGLE-TWIST DOUBLE-SCREW MIXER WITH WHEEL DISC |
US5653534A (en) * | 1994-10-12 | 1997-08-05 | Sumitomo Chemical Company, Limited | Screw apparatus and method for supplying reinforcing fiber-containing molten resin using the apparatus |
US6241840B1 (en) * | 1998-05-01 | 2001-06-05 | Flowtite Technology As | Thermoplastic liner pipe for potable water |
DE19848124A1 (en) * | 1998-10-19 | 2000-04-20 | Krupp Werner & Pfleiderer Gmbh | Process for the production of filled, modified and fiber-reinforced thermoplastics and twin-screw extruder for carrying out the process |
ATE281923T1 (en) * | 1999-10-01 | 2004-11-15 | Klaus Burk Gmbh Ing | METHOD AND DEVICE FOR PRODUCING A WINDING SLEEVE FOR RECEIVING WEB-SHAPED GOODS AND WINDING SLEEVE |
-
2003
- 2003-11-24 DE DE10355073A patent/DE10355073A1/en not_active Withdrawn
-
2004
- 2004-02-11 CN CNB2004100392964A patent/CN100528537C/en not_active Expired - Fee Related
- 2004-03-29 TR TR2004/00617A patent/TR200400617A2/en unknown
- 2004-11-09 SI SI200430869T patent/SI1691967T1/en unknown
- 2004-11-09 PT PT04797727T patent/PT1691967E/en unknown
- 2004-11-09 CA CA2548983A patent/CA2548983C/en not_active Expired - Fee Related
- 2004-11-09 DK DK04797727T patent/DK1691967T3/en active
- 2004-11-09 WO PCT/EP2004/012649 patent/WO2005053933A1/en active IP Right Grant
- 2004-11-09 EP EP04797727A patent/EP1691967B1/en not_active Not-in-force
- 2004-11-09 US US10/581,929 patent/US20080193688A1/en not_active Abandoned
- 2004-11-09 DE DE502004007516T patent/DE502004007516D1/en active Active
- 2004-11-09 AT AT04797727T patent/ATE399631T1/en active
- 2004-11-09 ES ES04797727T patent/ES2309575T3/en active Active
- 2004-11-09 PL PL04797727T patent/PL1691967T3/en unknown
Also Published As
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ES2309575T3 (en) | 2008-12-16 |
US20080193688A1 (en) | 2008-08-14 |
WO2005053933A1 (en) | 2005-06-16 |
DK1691967T3 (en) | 2008-11-10 |
CN1621218A (en) | 2005-06-01 |
EP1691967A1 (en) | 2006-08-23 |
TR200400617A2 (en) | 2005-06-21 |
SI1691967T1 (en) | 2008-12-31 |
DE10355073A1 (en) | 2005-06-09 |
PT1691967E (en) | 2008-10-09 |
EP1691967B1 (en) | 2008-07-02 |
PL1691967T3 (en) | 2008-12-31 |
DE502004007516D1 (en) | 2008-08-14 |
ATE399631T1 (en) | 2008-07-15 |
CA2548983A1 (en) | 2005-06-16 |
CN100528537C (en) | 2009-08-19 |
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